polished vs milled

polished and milled both are adjectives.

Word	Noun	Adjective	Verb	Adverb
polished	No	Yes	No	No
milled	No	Yes	No	No

As adjectives, polished and milled are synonyms defined as:

polished and milled: (of grains especially rice) having the husk or outer layers removed

polished (adjective)	milled (adjective)
perfected or made shiny and smooth	(of grains especially rice) having the husk or outer layers removed
(of grains especially rice) having the husk or outer layers removed
showing a high degree of refinement and the assurance that comes from wide social experience
(of lumber or stone) to trim and smooth